Cloth-shearing machine.



PATENTED JUNE 28,` 1904.

W. F. AMBAGH.

CLOTH SHEARING MACHINE.'

APPLICATION FILED MAY 19, 1902.

H0 MODEIL.

INVENTDH" BENI?.

rayman uns c UNITED STATES Y Patented J` une 28, 1904.

PATENT OEEIcE.

CLOTH-SHEARING MACHINE.

SPECIFICATION forming part of Letters Patent No. 763,835, dated June 28, 1904.

Application filed May 19, 1902. Serial No. 107,920` (No model.)

T0 all whom t may concern:

Be it known that I, VV'ILLIAM F. AMBAcII, a citizen ofthe United States, residing at Voonsocket, in the county of Providence and State of Rhode Island, have invented a new and useful Improvement in Oloth-Shearing Machines, of which the following is a specification.

In cloth-shearing machines the cloth is supported on the Ausually rounded edge of the cloth-rest and is operated on by the usually revolving` cutters.

The object of the operation is to shear the raised nap and produce a uniform even surface on the cloth. The cloth is under tension as it passes over the cloth-rest, and any local irregularity in. the weave of the cloth, suoli as a knot, will bring the surface of the cloth at this particular point closer to the shearingknives and cause the nap to be cut closer than at other parts of the surface. Practical experiments to overcome these defects in the cloth by the use of cushions made of rubber or similar elastic material have demonstrated that these do not overcome the defects, because the material of such cushions does not yield locally to the knots, but forms a somewhat extended dished depression which appears in the sheared nap as a raised spot. I have, however, found that with a cushion formed of felted fiber interposed between the cloth-rest and the cloth knots and other imperfections in the weave will cause the cushion to yield locally, so that an even surface of the cloth is maintained and the nap is shown evenly, presenting a finished surface.

I have illustrated in the accompanying drawings the construction of my improved cushion and its use in connection with a cloth-rest substantially like those shown in Patents Nos. 634,602 and'634.,603, dated October 10, 1899, for a rest for cloth-shearing machines. I do not wish to confine myself to any particular form of cloth-rest or the particular form of cushion herein described.

Figure l is a sectional view of a cloth-rest for cloth-shearing machines provided with my improved cushion. Fig. 2 is a transverse sectional view of an apron provided with my improved cushion. Fig. 3 is a perspective view of the apron.

In the drawings, c indicates a sheet of felt formed byfelting fibrous material into a sheet of uniform thickness. In the preferred form the sheet of felt c is secured between the folded sheet 7) of cotton cloth forming the apron B, the fold of which is secured to the rod b by means of the clamps b2 b2. The clamps serve to hold the sheet on the rod and also engage the sheet (Z as it travels over the cloth-rest. The apron B extends from the rod b over the cloth-rest and around the nose B2 of the same, being held in position by the sheet of cloth (l, usually smoothly finished silesia cloth, extending from the roll D over the apron B to the roll D. The cloth c to be sheared is indicated by a broken line. The shearing-cutter E is indicated in broken lines, as is also the shearing-blade F. d

rIhe felt used is preferably made of short liber. The sheet may be of such thickness as will best support cloth, of the weight required to be sheared. The felt may be made of any desired density, so as to form a more or less yielding cushion. The felt cushion when used on a cloth-shearing machine differs in its action from rubber 0r similar cushions in that knots or .imperfections in the weave of the cloth depress the cushion locally, because the fibers of the felt yield laterally and support the cloth close up to the knot or imperfection in the weave, thereby insuring the even cutting of the nap and uniform finish of the cloth.

Having thus described my invention, I claim WILLIAM E. AMBACH.

Witnesses:

ADA E. HAGERTY, J. A. MILLER, Jr. 

